Double siphon



1952 F. DE ENCISO Y CARNERERO DOUBLE SIPHON Filed June 4, 1946 INVENTOR. 7

Patented Oct. 7, 1952 DOUBLE SIPHON Fernndde'Enciso y Carnerearo, Madrid, Spain y r Application J.ur1er4, 1946, Serial No. 67:4,346

InSpain May4, 1945 Section 1; Public Law 690, August 8, i946 "Patent expires May 4, i965 9 Clai ms (cx. 137 133)" This invention relates to compound siphons, 'particularly to siphons for flushing purposes, of the kind in which two siphons are connected in series by a band which joiris the outlet of the inle-t siphon with the inlet of the discharge siphon, and a ventilation tube is provided"Which connects the bend at the top of the inlet siphon with the bend at the top of the disc-harge'siphon." r b In known siphons of this type it is hardly pos.- sibleto avoid the occurrence of a period of irregular although progressive discharge which, though not being of much significancecr flushing purposes,should be classified as adefect ii the sixihon is intended for other uses. .V

According to the invention this disadvantage is obviated by providing an enlargement or container atan intermediate point of the ventilation tube. A

Moreover known compoundsiphons areactu- 'atedby means of an air-outlet valve, i. e., a device adapted to allow the escape of the compressed air separating two partial 'columns of liquid in the siphon. .Howeve-r, the drawbacks of Such outlet valves arewell known,and one object'of the present invention is to provide a sys, tem operating by means of a pressure producing plunger, for example, a device which causes the escape of the said compressed air through the siphon itself by forcing into the ventilati0n tube of the siphon a. suitable amount of air, nozspecial measures for sealing the control adevice:bein then necessary.

The acoompanying drawings illustrateseveral eni1bodiments of the invention, by :means of which the above drawbacks are eliminated. In the drawings: A

- Figur 1 shows a fundamental embodimentof a. siphon according to the inventionfor intermittent and automatic discharge;f u. 7

A Figure 2 showsthe improved siphon including a vntilation' tube which extends between the upper bends of the compound siphon;

Figure 3 showsin elevaticn an eri1bodiment. whichircludes a'n air-Outlet valve; i

Figure *4 -shows an -embodiment' of the com:

pound si'phon 'with an air Pre-ssureproddcing plunger;

Figure'5 shows in elevaton an embodimentof a compound Siphon modified to provide adjustable dischare'e:

invention embedded in the wal of a tank; -and Figure 7 illustrates a siphon for-the handling otviscous liquids. With reference to the drawings;andpartcu- Figure 6 shows the s1phon according -to the" larly to Figure l, it will be seen that the compo und siph0nconsists of the usual four parallel branches or iegs l, 2, 3 and4, with the branches 3 and 4 of greater vertical extent than branches l and 2.. :The iniet end of the siphon is the open end of thebranch I, and the dischargeend is the open end cfthe branch 4. The branch 2 is the one adapted to house the air plug which steps the flow of thelquid: A ventilation tube adapted to cause the abrupt eXpulsion of the saidair plug is connectedat one end to the highest point of the housing of the air plug and at the other end to a suitable point of the last .br'anch 4' of the siphon. Thus Figure 2 shows the ventilation -tube 9, liloonnected at'one end to the bend 5 joining the branches i and 2 and at the other end to thebend 28'joining.thebranohes 3 and4.

According to the invention the ventilation tube 9, ID has an enlaigement:or container 8 of suitable dimens'ionscorresponding to the dimensions of the siphon. From opposite ends-of this "enlargement or container 8 start the two branches 9 and 10 of the ventilatioh tube, which connect the s"aidcontainer with the bands 5and 28 re. spectivelyof the siphon as may be seen.in' the drawing. Y

r The operation of..:the compound siphonjust described .i's such that when the pressure of the air plug in theiaranch 2 has attained the prescribed val1e which responde to the charact-er istics of the, equipment, the liquid. contained :in the enlargement 8 fiows out through :the :tubel0 to the.eorrespondingbend 28 andat. a givens,ub-

sequent time :the said tube lo, upon becoming entirely .devoid :of liquid. allows; the quick :ahd automatic=exhausting of the air plug through the tube 9 of the container and through: the said tube lil. r At :this point, the;liqudcolumrrs of the bram3hes. l and 3 becomeunitedby the action Y of .gravity, thusfrmng;axsingle stream, without prior art,'and.permts pthezdischarge to occur automatically: and at :f'ull stream without becom" ingturbid and Without.vortexmotonz '-2;

Figure 3: illustrte's za .compound siphon which makes use:hf an air-outlet Lvalve A 1:2. r .'Ihis; ar.- rangement allows the -discharee. at:wil1 f .2hfi:

liquid containedt inka tank lor ;thelike .bi; the; L

actuation of the sad valve l.2, when oncethez necessary conditions of water level in='thetani:

have been =attained: As before, the enlargemeht obviates the ne 8 is connected by the tube 9 with the bend connecting the inlet branch l with the second branch 2, and by the tube lll with the bend 28 connecting the branch 3 with the discharge branch 4. In this embodiment, however, there is a further tube ll extending upwards from a point in an arch-like infiection in the tube IO. The top of this tube ll is normally closed by a valve l2, which can be opened at will by any convenient means such as by depressing the spring-biased push button l3. The operation of this arrangement is such that when the pressure of the gaseous plug has reached a predetermined value. the space within the enlargement 8 and the outward tube IO as far as the aforesaid arch-like inflection is completely free from liquid. If the valve l2 is then opened, the siphon is primed as before. So long as the valve 12 is not opened the siphon remains ready to operate, or will in due course discharge automatically when the appropriate conditions arise.

The embodiment illustrated in Figure 4 is distinguished from that of Figures 2 and 3 by the fact that it makes use of an air-pressure producing device 14, for example, a device substantially consisting of a cylinder connected to the third branch l l of the ventilation tube and containing a spring-controlled piston, adapted to be actuated at will, which compresses a predetermined amount of air into the said branch ll of the ventilaton tube, th characteristics of which may be appreciated from said figures.

This third branch ll is shaped with an angle bend of suitable dimensions, and is permanently fed with a predetermined volume of liquid, communication between the container 8 and the outside being prevented by the air valve I4.

.The structure of this bend and of the connection to the pressure producing device 14 will be evident if it is borne in mind that the piston of. the latter transmits the energy of its movement by:translation of the gaseous mass existing between the liquid of the bent respiration tube and the said piston. As a consequence of this translation a twin movement of the said liquid towards the container 8 is produced, which, acting upon the gaseous mass contained in the latter, causes the exhausting of the residual liquid in the tube lll joining the said container with the bend 28 'connecting the branches 3 and 4 of the siphon. thuscnnecting the air plugwith the outside through the said branch l.

If' the piston of the device l4 is not actuated, thisform of the device, like that of Figure 2. would operate automatically in the-manner described with respect to the fundamental embodiment of Figure 1.

:Figure '5 shws"diagrammatcaily a siphon in Which the volume of the discharge can be modified by varying the height of the branches l, 2, 3, l. To this end, each of the branches is made in two parts, one of which ts tightly into the other. As. shown in Figure 5, the height of the branches can be adjusted vertically since clamps I5 and l6 respectively secured to the branches l, 2 and 3. 4 are threadedon a screw rod l1 which can be rotated by the bevel gear arrangement ls. The rotation of the J screw rodeiects sliding mo'vement of the branches l, 2,:3 and 4 in the tubular parts l','2,:3-, and 4. In this modification as shown, the'vntilation tubes and control device l4 are :utilized,' and to permit the sliding movement of the partsas the tubes 9, lo and l l are.fiexible tubes. .".Figure 6 representsa specific embodiment of 4 the siphon according to the invention, particularly according to Figure 2, in which the whole of the siphon is cast in the wall of the tank to be controlled. This embodiment might oier special advantages. even allowing the suppression of gate vanes in hydraulc dams.

Figure 7 shows a modiflcation in which the interior of the siphon is provided with a bundle of blades or tubes 18 so spaced from each other as to produce a capillary effect. This embodiment is especially suited for viscous liquids, and enables them to be handled without difllculty.

It is to be particularly noted that all the modifications of the ventilation tube already described may also utilize the blades or tubes of this embodiment.

The invention attains the objects listed at the beginning of this speciflcation, thus providing a compound siphon of simpler construction and operating more reliably than those according to the prior art.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is:

l. In a liquidcontrol device, four parallel ver.- tical tubes, the lower end of one of said tubes constituting aliquid inlet and the lower end of another of said tubes constituting a liquid outlet, and upper and lower elbows establishing communication between the remaining ends of the tubes and connecting said tubes in series from the liquid inlet to the liquid outlet, the upper elbow nearest adjacent the liquid outlet being disposed at a higher elevation than the upper elbow nearest adjacent the liquid inlet, and a valve controlled tube connected with the second mentioned pipe. v

2. A compound siphon comprising two siphons connected in series and each including spaced parallel vertical legs and an upper bend. the second siphon having legs of greater vertical extent than and parallel to the legs of the first siphon, the bend of the second siphon being disposed at a higher level than the bend of the first siphon; a tube providing communication between the upper bends of the siphons, said tube having an enlarged portion therein adjacent the first siphon constituting a chamber parallel to the legs thereof. said tube further including a portion extending downwardly from said chamber, a,reverse bend, and a portion extending upwardly therefrom toward the bend of the second siphon,and communicating therewith at a point abovefthe upper portion of the first siphon, said tube and enlarged portion therein constituting a vent tube eliminating intermittent leakage and permitting rapid,exhausti0n of the entrapped air plug lying between the siphons.*

3. A compound siphon as defined in and by claim 2 wherein the upper bend portions constitute respective integral units of inverted-U shape form and wherein parallel open ended pipes constitute the legs of the siphons, the said bend.portions being telescopically receivedwithin the legportions, and means for adjus ting the height of the bends relative to the legs to .vary the discharge volume including a vertically disposed screw, plural clamp means threadedon the screw and respectively connected to each of the upper bend portions. and means fo r rotating the screw to displace the clamp means vertically to vary the position of the bends relative to, the upper ends of the legs.

4, A compound siphon as defined in and by claim 3, wherein the tube providing communication between the bend portions is flexible.

5. A compound siphon comprising two siphons connected in series and each including spaced parallel vertical legs and an upper bend, the seoond siphon having legs of greater vertical extent than and parallel to the legs of the first siphon, the bend of the second siphon being disposed at a higher level than the bend of the first siphon, a tube providing communication between the upper bends of the siphons, said tube having an enlarged portion therein adjacent the first siphon constituting a chamber parallel to the legs thereof. said tube further including a portion extending downwardly from said chamber, a reverse bend, a portion extending upwardly therefrom toward the bend of the second siphon, and an arched portion including another reverse bend communicatng with the bend of the second siphon, a priming tube extending from the said arched portion, and priming means closing the end of said priming tube.

6. A compound siphon as defined in and by claim 5, wherein said priming tube extends vertically and said priming means comprises a manually operable valve closing the same.

7. A compound siphon as defined in and by claim 5, wherein said priming tube includes a portion extending arcuately from the arched portion, a portion extending vertically downwardly from the arcuate portion and disposed parallel to said legs and reaching a point disposed in a plane passing through the bottom portion of said chamber, a reverse bend extending from this point, an upwardly directed angularly extended portion continuing from said last mentioned reverse bend, and priming means connected to said angular portion including a manually controlled variable air pressure chamber closing the same.

8. In a liquid control device, four parallel vertical tubes, the lower end of one of said tubes constituting a liquid inlet, and the lower end of another of said tubesconstituting a liquid outlet and upper andlower elbows establishing communication between the remaining ends; of the tubes and connecting said tubes in series from the liquid inlet to the liquid Outlet, the upper elbow nearest adjacent the liquid outlet being disposed at a higher elevation than the upper elbow nearest adjacent the liquid inlet, a manometrical control including a chamber, a pipe of small diameter connecting the upper end of the chamber with the second mentioned upper elbow, a pipe corresponding in diameter to the first pipe connecting the lower end of the chamber with the first mentioned upper elbow and a plurality of capillary elements located in the tube lying between the first mentioned upper elbow and the lower elbow.

9. In combination, walls defining a tank, a liquid control device comprising four parallel vertical tubes, the lower end of one of said tubes constitutng a liquid inlet, and the lower end of another of said tubes constituting a liquid outlet munication between the remaining ends of the tubes and connecting said tubes in series from the liquid Inlet to the liquid outlet, the upper elbow nearest adjacent the liquid outlet being disposed at a higher elevation than the upper elbow nearest adjacent the liquid inlet, a manometrical control including a chamber, a pipe of small diameter connecting the upper end of the chamber with the second mentioned upper elbow, a pipe corresponding in diameter to the first pipe connecting the lower end of the Chamber with the first mentioned upper elbow, and said tubes and elbows being embedded in a wall of the tank with the liquid inlet in communication with the interior of the tank and the liquid outlet located externally of the tank.

FERNANDO DE ENCISO Y CARNERERO.

REFEREN CES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 753,174 Smith Feb. 23, 1904 963,231 Mahoney July 5, 1910 1,077,471 Herzfeld Nov. 4, 1913 1,150,673 Greth Aug. 17, 1915 1,289,829 Leanhart Dec. 31, 1918 1,421,531 Moras July 4, 1922 1,755,218 .Jertberg Apr. 22, 1930 

